Stovepipe-fastener.



No. 875,524; PATENTEDV DEC. 31, 1907.

,G. O. HELVIG.

STOVBPIPE PASTENEE.

APPLICATION FILED JULY 16, 1907.

2 SHEETS-SHEET 1.

wmv5ss5s INVENTOI? Gilbert Olfelm'g I "Mra ATTORNEYS No. 275,524.PATENTEIJ DEG.31,190'7. G. 0. HELVIG.

STOVEPI PB FASTENEE.

APPLICATION FILED JULYIB, 1907.

Z3 2 SHEETS-SHEET 2.

lNVENTOH WITNESSES Gi lberZ' OHeZI/i w ATTORNEYS I i GILBERT O. HELVIG,OF DAWbON, MINNESOTA.

STOVEPIPE-FASTENER.

Specification of Letters Patent.

Patented Dec. 31, 1.907.

Application filed ly 16. 1907. Serial No. 383.963-

T all whom it may concern:

Be it known that I, GILBERT O. TTELVIG, a citizen of the United States,and a resident of Dawson, in the county of Lac qui Parle and State ofMinnesota, have invented a new and Improved Stovepipe-Fastener, of whichthe following is a full clear, and exactdescription.

This invention relates to means for securing together the adjacent endsof pipe sec tions, and is particularly adapted for use in connectionwith stove and other pipes of a similar nature formed of sheet metal.

The invention consists in certain features of construction andcombinations of parts, all of which will be fully set forth hereinafterand particularly pointed out in the claims.

Reference is to hehad to the accompanying drawings, forming a part ofthis specification, in which similar"characters of reference indicatecorresponding parts in all the figures, and in which Figure" 1 is an endview of two pipe sections provided with securing means constructed inaccordance with my invention; Fig. 2 is a central longitudinal sectiontaken on the line 2-2 of Fig. 1; Fig. 3 is a view similar to Fig. i, butshowing a different form of construction; and Fig. 'i is a centrallongitudinal section taken on the line -'i-4 of Fig. 3. I

My improved fastening means is adaptable for use in securing togetherthe ends of pipe sections, particularly stove pipes and other pipesformed of sheet n'ietal. and is of such a nature that it may be readilyemployed in connection with pipes already manufactured, as it does notinvolve any specific construction of the pipe other than the providingof one of the pipe sections with l-ongitiulinallydisposed slotsextci'iding inwardly from the end a short distance.

In the drawings I have illustrated two pipe sections 10 and 11 havingtheir ends telescoping, the pipe 11 being illustrated as extending intothe end of the pipe 10. of the pipes is provided with longitudinalslots, and from a. structural standpoint it is j entirely immaterialwhether this be the outer i f I A plurality of bolts 18, each extendingthrough an aperture in the wall of the outer pipe and through one of theslots of the. inner pipe. The bolts are held from longitudinal move mentby their engagement in the apertures, and the inner pipe is permitted toslide longitut'iina'lly to the desired point by the engagement of thebolts in the slots. -Up0n the inner end of each bolt there is provided anut 14, and means are provided for preventing the rotation of thesenuts. This means preferably comprises an extensible annular ring withinthe inner pipe and having guideways for holding the nuts. Intheconstruction illustrated in Figs. 1 and 2, this'extensiblc ring takesthe form of a band 15 of sheet metal having one end thereof providedwit-h inwardly-curved flanges 16 to act as a retainer for the oppositeend and permit of an expansion and contraction of the ring. -At pointsalong the length of the ring corresponding to the apertures 1n the outerpipe and to the slots 12 in the inner pipe, there are provided aplurality of slots extending at right angles to the slots 12 and.through which .the bolts 13 may extend. Adjacent each of these openingsthe wall of the ring is provided with a flange preferably integraltherewith and having a portion 17 bent outwardlytoa distance.substantially equal to the thickness of the nut, and then bentparalleltozthe body of the band to form a retaining portion 18 adjacentthe outer surface of the nut. The edge 19 of the flange may be benttoward the band, if desired. Each of the flanges serves to form aguidewa-y for the nut disposed therein and positively preventsthe-rotation of said nut. Each nut is preferably longi tudinally movablewithin its guidcway to accommodate for the. expansion and contraction ofthe ring, but, if desired, the nuts may be rigidly secured within theguideways and the bolts inserted only after the ring has been xpanded inplace and the nuts brought to be proper alinement with the bolt openingsin the ouierpipe section.

in the form illustrated in Figs. 3 and 4, instead of providing a sheetmetal band, the extensible annular member is formed of wire and uponthis wire are mounted the guides or retainers for the nuts. Asillustrated, the ring is formed of a single wire 20, adjacent f theinner surface of the pipe- 11 and extending twice around thecircumference thereof.

Each end of the wire is provided with a loop 21 encircling the portionto the wire adjacent 4 thereto, whereby upon varying the distancealinement with the between the' loops the ring may be made larger orsmaller. The two courses of the wire are preferably spaced a shortdistance apart and the retainers 22 are formed of sheet metalinclosingboth courses of the wire and holding them apart a distancesubstantially equal to the Width of the nut. The retainers arepreferably longitudinally movable along the wireto bring them intoproper bolts. There is no necessity for longitudinal movement of thenuts in respect to the retainers, and said nuts are therefore preferablysoldered or otherwise rigidly secured within said retainers.

In assembling the device, the inner ring is placed within the end of theouter pipe section and collapsed, so as to be spaced a short distancetherefrom, the bolts are inserted and turned into the nuts. by the useof a screwglriver, and. the inner pipe 11 is then moved longitudinallybetween the outer pipe and the inner ring until the two pipesaretelescoped to the desired extent, such telescoping being permitted bythe entry of the bolts into the slots 12. The boltsare then tightenedand the nuts drawn outwardly to expand the ring and draw the same intofirm engagment with the inner surface of the in ner pipe and to bindthis pipe into firm engagement with the outer one. The slots 12 may beof any desired length dependent upon the extent to which it is desiredthat the pipes be telescoped, and in theform-illustrated in Figs. 1 and2, the extensible ring may extend longitudinally a'suitable distancebeyond the end of the outer pipe 10, whereby if the two pipes are nottelescoped a sufilcient extent to bring the ends of the slots 12- intothe pipe 10, the ring will cover the slots upon their inner surface.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1.-The combination with two pipe sections having telescoping ends, of anextensible ring within the pipe sections, and a plu- I rality of boltsextending through the walls of both pipe sections and. through saidring.

2. The combination with two pipe sections having telescoping ends, of anextensible ring within the pipe sections, 'a nut nonrotatably held bysaid ring and a bolt ex-.

tending through the wall of both pipe sections and into said nut.

3. The combination with two pipe sections having telescoping ends, ofbolts .extending through the adjacent walls of both sections, nuts atthe inner ends of said bolts, and a ring for, preventing the rotation ofsaid nuts. i i i a 4. The combination with two pipe sections, one ofwhich is provided with a plurality oflongitudinally disposed slotsadjacent the end thereof and said end telescoping with the end of theother section, of bolts extending through the 'outer 1 section andthrough said slots in the inner section, and

two subscribing witnesses.

. GILBERT O. HELVIG. Witnesses A. W. EWING, -A. J. -PETERSON.

